86 lines
1.5 KiB
Plaintext
86 lines
1.5 KiB
Plaintext
; The OS/K Team licenses this file to you under the MIT license.
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; See the LICENSE file in the project root for more information.
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TrapHandlers.prolog:
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mov rbp, zero
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; rax = caller's cr2
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call RFS.LoadReg, r14, $cr2
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; we don't preserve the r12 we got
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mov r12, rax
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mov rdx, zero
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jmp rcx
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TrapHandlers.epilog:
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; TRAP return values: RAX-RDX
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mov ax2, rax
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call RFS.StoreReg, r14, $rax
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mov ax2, rdx
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call RFS.StoreReg, r14, $rdx
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call IDT.DoneHandling, r13
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iret
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ScreenOfDeath:
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push r12
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mov r12, ax0
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prn 10
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prn PRN_CLEAR
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prn PRN_FLUSH
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push ax1
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call printf, .scr1
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pop zero
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b.nz r14, zero, .not_con
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push .scr2_con
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jmp .do_print
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.not_con:
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b.l r14, 4, .not_krn
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push .scr2_krn
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jmp .do_print
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.not_krn:
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push .scr2_usr
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.do_print:
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push r14
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push r12
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call printf, .scr2
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inc rsp, 24
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call dumprf, r14
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prn 10
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call print, .scr3
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.loop:
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pause
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pause
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scan rax
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jmp.axz .loop
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b.z rax, 0x0A, DefaultTrapHandler.handle_Exit
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b.z rax, 0x1B, DefaultTrapHandler.handle_Shutdown
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jmp .loop
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crash
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.scr1 = "-------- Unhandled EXCEPTION, TRAP/SYSCALL or INTERRUPT (code %d)\n"
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.scr2 = "Description: %s\nFrame: %d (%s)\n\n"
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.scr3 = "Press:\n ENTER to procede to COMMAND.COM\n ESCAPE to shutdown machine\n\n"
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.scr2_con = "dedicated command.com frame"
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.scr2_usr = "userspace application frame"
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.scr2_krn = "exception/interrupt handler"
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